dev.hatang/mcp
Ha Tang
Is the Ha Tang MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-04.
Ha Tang docs and API for agents: email, VietQR payments, e-invoices, support inbox (Vietnam).
alive probed 2026-11-14 · unchanged since 2026-11-04
22tools
4.3ktokens in Claude Opus 5.5
2.2 %of Claude's 200k window
1.7×the median server
298 msto initialize
15 msto list tools
- Run it
- npx -y @hatang/mcp@0.1.1 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- hatang 0.1.1
- Capabilities
- tools
- Instructions
- 925 characters
- Of a 1M window
- 0.4 % of a 1M context window
- Count
- 4.3k tokens in Claude Opus 5.5, exact, measured 2026-11-04. With the Claude Code prefix mcp__…__ on each tool name: 4.5k. The o200k_base estimate is 2.3k. Counted again when the tool definitions change. Method.
- Website
- https://hatang.dev/docs/guides/sdks/mcp
- Registry
- active, updated 2026-11-03 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.85×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| send_email | 563 | 305 | 13 % |
| create_payment | 467 | 253 | 11 % |
| knowledge_upsert | 292 | 158 | 7 % |
| list_conversations | 247 | 134 | 6 % |
| search_docs | 216 | 117 | 5 % |
Compare this server with others.
More servers
Other registry entries on npmjs.com, the ones next to this name; all of them.
- Laguarde dev.futur-panda/laguarde · crashed on start
- dev.getsnap/getsnap · alive
- dev.getstub/check · alive
- dev.glbforge/glbforge · alive
- Ensemble dev.hearthbyte/ensemble · alive
- dev.hythe/hythe · crashed on start
- Ikenga iyke (control bridge) dev.ikenga/mcp-iyke · alive
- Svipall dev.ilien.svipall/mcp · crashed on start
Servers that mention tang.
- Intangible ai.intangible/mcp · needs auth
- Untangle bio.untangle/untangle · needs auth
- agentpay — card-funded wallets for AI agents com.entangleit/agentpay · alive
- PariteCK com.entangleeq/pay-transparency · alive
- MyBestAngle com.mybestangle/mybestangle · needs auth
- Tango dev.tango/tango · needs auth
- Tango io.applayer/tango · needs auth
- The Emotion Dictionary io.github.GaetanGermain/emotion-dictionary · needs auth
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.